Meth is substantially more serotonergic IIRC. Can’t find the numbers.

Serotonegic? What does that even mean?

For a given quantity, eg 1mg, of methylamphetamine vs d-amphetamine, the meth will release more serotonin?

Higher relative affinity for 5-HT receptors over DA.

There's no way. I snorted a bump of approximately 50mg, at the most, off of my hand and was completely jacked for 48 hours. It was the most uncomfortable speedy high I've ever experienced. I drank an entire case of beer trying to come down and it did almost nothing. I've gone through a gram of coke in a night, snorted and/or smoked, and it was nothing compared to meth. I'm on 30mg Adderall daily and I can sleep just fine.

I remember thinking "Why would anyone want to feel like this?" Will never touch the stuff again.

You most likely did far more than 50mg of methamphetamine.

I just weighed a couple 20mg orange adderall pills, they're each around 0.2-0.3 grams (my scale is only accurate to 0.1g)